how do you cite evidence for an essay

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Using Evidence: Citing Sources Properly

Citing sources properly is essential to avoiding plagiarism in your writing. Not citing sources properly could imply that the ideas, information, and phrasing you are using are your own, when they actually originated with another author. Plagiarism doesn't just mean copy and pasting another author's words. Review Amber's blog post, "Avoiding Unintentional Plagiarism," for more information! Plagiarism can occur when authors:

• Do not include enough citations for paraphrased information,
• Paraphrase a source incorrectly,
• Do not use quotation marks, or
• Directly copy and paste phrasing from a source without quotation marks or citations.

Read more about how to avoid these types of plagiarism on the following subpages and review the Plagiarism Detection & Revision Skills video playlist on this page. For more information on avoiding plagiarism, see our Plagiarism Prevention Resource Kit .

Also make sure to consult our resources on citations to learn about the correct formatting for citations.

What to Consider

Citation issues can appear when writers use too much information from a source, rather than including their own ideas and commentary on sources' information. Here are some factors to consider when citing sources:

Remember that the cited material should illustrate rather than substitute for your point. Make sure your paper is more than a collection of ideas from your sources; it should provide an original interpretation of that material. For help with creating this commentary while also avoiding personal opinion, see our Commentary vs. Opinion resource.

The opening sentence of each paragraph should be your topic sentence , and the final sentence in the paragraph should conclude your point and lead into the next. Without these aspects, you leave your reader without a sense of the paragraph's main purpose. Additionally, the reader may not understand your reasons for including that material.

All material that you cite should contribute to your main argument (also called a thesis or purpose statement). When reading the literature, keep that argument in mind, noting ideas or research that speaks specifically to the issues in your particular study. See our synthesis demonstration for help learning how to use the literature in this way.

Most research papers should include a variety of sources from the last 3-5 years. You may find one particularly useful study, but try to balance your references to that study with research from other authors. Otherwise, your paper becomes a book report on that one source and lacks richness of theoretical perspective.

Direct quotations are best avoided whenever possible. While direct quotations can be useful for illustrating a rhetorical choice of your author, in most other cases paraphrasing the material is more appropriate. Using your own words by paraphrasing will better demonstrate your understanding and will allow you to emphasize the ways in which the ideas contribute to your paper's main argument.

Plagiarism Detection & Revising Skills Video Playlist

Citing Sources Video Playlist

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How to cite evidence.

Image: unsplash.com

Citing textual evidence is critical to academic writing, professional communications, and even everyday discussions where arguments need to be supported by facts. Your ability to reference specific parts of a text improves credibility and strengthens your arguments, allowing you to present a well-rounded and persuasive case. For this reason, we wanted to give you a quick overview of how to cite evidence effectively, using one method in particular – the RACE strategy .

Introduction to Citing Text Evidence

The core reason for citing evidence is to lend credibility to an argument , showing the audience that the points being made are not just based on personal opinion but are backed by solid references. This practice is foundational in academic settings. There, the questions that students need to respond to are often constructed in a way that requires citing of evidence to support their answers. However, how can we make this process more quick and effectice? The answer lies in the RACE strategy, which is a special framework called to streamlines the process of citing textual evidence.

What is the RACE Strategy?

The RACE strategy stands for Restate, Answer, Cite evidence, and Explain. It is a methodical approach designed to help individuals construct well-structured answers that include textual proof. Let’s break down this method a little bit so you have some kind of impression on what we are going to talk about further.

• Restating the question or prompt in the introduction of the answer helps the writer to set the stage for a clear response.
• The direct answer, taht follows afterwards, presents the key point or thesis of the question.
• After we’e given an answer, we can move on to citing evidence, where we will integrate specific examples from the text to support the answer.
• Finally, we can move on to explaining our evidence. Here, it’s important to elaborating on how the cited examples support the argument we made.

This structured approach not only helps in organizing thoughts but also makes sure that the necessary components of a well-supported argument are present. Just like how to cite the constitution you have to be precise and factual. Let’s explore each step with actual examples to better illustrate how this strategy can help you with the process of citing textual evidence.

Restating basically means paraphrasing the original question or statement within your answer. This step demonstrates your understanding of the question and sets the stage for your response.

By answering directly, you respond to the question and therefore briefly present your main argument or thesis. You should stay clear and concise here, providing a straightforward statement of your position or understanding.

Cite Evidence

Citing evidence is where you integrate specific examples from the text to support your answer. This involves quoting or paraphrasing passages and pointing out where in the text your evidence can be found. Don’t forget to use quotation marks appropriately for direct quotes and to provide context for your citations or let a legal citation machine handle it.

For instance, to support the theme of racial injustice, you might cite evidence by saying,

When explaining, you elaborat on how your cited evidence supports your answer. This step connects your evidence back to your main argument, demonstrating a deeper understanding of the text.

After citing evidence, an explanation could be structured the following way,

To put it all together, here’s how an integrated response using the RACE strategy might look:

Response : ⬇

“The novel ‘To Kill a Mockingbird’ primarily explores themes such as racial injustice and the loss of innocence. One of the central themes is racial injustice, which is depicted through the trial of Tom Robinson and its impact on the town of Maycomb. Harper Lee illustrates this theme through the character of Atticus Finch, who states, ‘In our courts, when it’s a white man’s word against a black man’s, the white man always wins.’ (Lee, 1960, p. 295). This quote highlights the deeply ingrained racial biases within the judicial system of Maycomb, underscoring the novel’s critique of racial injustice and its effects on individuals and society as a whole.”

By following the RACE strategy and using actual examples, you can effectively structure clear and relevant responses that add depth to your argumentation. This method not only help in organizing thoughts but also in demonstrating a deep understanding of the text and its main topics.

However, there are a few nuances that you have to be aware of. The first one is the use of quotation marks. Don’t forget them when referencing direct quotes from a text, as they indicate that you took those words verbatim. Furthermore, you have to understand and use citation styles relevant to the discipline or context you write on. This will help you appropriately format your references and avoid unintentional plagiarizing. A quick tip: sentence starters and tags for dialogue can also help with introduction of quoted or paraphrased evidence effectively, as they let the reader or listener easily follow the argument’s progression.

Still not sure? Try our Free Citation Generator

Adapting the race strategy for distance learning.

Even in the case of distance learnign , the RACE strategy remains a valuable tool for teaching students how to cite evidence effectively. Digital resources such as Google Docs often offer collaborative platforms where teachers can share templates, sentence stems, and color-coded examples to guide students through the response building process.

Moreover, interactive activities facilitated through online tools, can further engage students in practicing citing evidence, with digital resources providing immediate feedback and opportunities for revision. This adaptation help develop the skill of citing textual evidence even in a remote learning setting.

It’s hard to argue that citing textual evidence is useful skill that can help you get far in your academic writing as well as in other more professional fields. Following the RACE strategy and using our tips on referencing, you, as students, can create well-structured and compelling responses (which no professor could argue with).

How can I use the RACE strategy to improve my essay writing?

You can use the RACE strategy to structure your paragraphs or entire essays by ensuring that each section includes a restatement of the question (if applicable), a clear answer or thesis statement, cited evidence from your sources, and an explanation of how this evidence supports your argument. This approach can enhance clarity, coherence, and persuasiveness.

What are some tips for effectively citing evidence in my writing?

Some tips for effectively citing evidence are: using direct quotes from the text with proper quotation marks, paraphrasing accurately while maintaining the original meaning, providing specific examples, and ensuring that your citations are relevant and support your argument. Always include page numbers or other locator information if available.

Is the RACE strategy useful for standardized tests or only for classroom assignments?

The RACE strategy is beneficial for a wide range of writing tasks, including standardized tests, classroom assignments, and even professional writing. Its structured approach to constructing responses makes it a valuable tool for any situation requiring evidence-based writing.

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Writing with artificial intelligence, citation – how to connect evidence to your claims.

• © 2023 by Jennifer Janechek - IBM Quantum , Eir-Anne Edgar

As you begin to incorporate evidence into your papers, it is important that you clearly connect that evidence to your own claims. Though connections may seem obvious to you, they may not be obvious to your readers. In this article, you will learn a few ways to link evidence to your arguments.

Many emerging writers struggle with connecting sourced material to their claims and to their thesis. Oftentimes, this is because they’re too close to their work and think that the connection between claim and evidence is completely apparent to the reader. Even if the connection is readily visible, authors should still follow up a piece of sourced material with an explanation of its relevance to the author’s point, purpose, and/or thesis. Such connections (“analysis”) should be made directly following the sourced material.

Remember that your essay is your opportunity to showcase your ideas and arguments. Avoid using an excessive amount of source material; doing so can take your readers’ focus away from your original arguments. Going back to the notion that writing is engaging in conversation, think of engaging with your source material as if you are having a conversation with the writers themselves. You can use source material to lend support, to complicate, or even to argue against previous ideas.

Making Connections

Let’s say that we’re writing a research paper that suggests offshore drilling should be banned, and our thesis is as follows:

Though some may argue that offshore drilling provides economic advantages and would lessen our dependence on foreign oil, the environmental and economic consequences of an oil spill are so drastic that they far outweigh the advantages.

Following this thesis come body paragraphs relating our main points: (1) the known economic impact of past oil spills; (2) the known environmental impact of past oil spills; (3) the potential impact of oil spills on marine and human life; (4) a comparison between advantages and disadvantages of offshore drilling; and (5) a response to potential counterarguments. Our conclusion would then include a proposal to ban offshore drilling.

So, for instance, in our fifth body paragraph we include the following claim (in our topic sentence) and also provide the following support:

Others argue that the US needs to end its dependence on foreign oil from unstable regions, which necessitates domestic oil production. During an April 2010 speech to the Southern Republican conference, Sarah Palin responded to the ongoing debate about offshore drilling and insisted that “relying on foreign regimes to meet our energy needs makes us less secure and makes us more beholden to these countries” (Malcom).

We can’t, as writers, just stop there, because our reader would not necessarily know the connection between our point and the quote. As such, we must make the connection for our reader. Here are a few ways to make such a connection:

• Break down ideas:  Palin’s assertion implies that the majority of our oil comes from unstable regimes in antidemocratic regions. Although we understand her concerns about providing such regimes with a measure of economic power over the United States, we believe that offshore drilling poses a greater threat to the stability of our economy.
• Connect back to the thesis:  Though Palin’s argument is representative of a group that views offshore drilling as a necessity, it fails to acknowledge that America’s largest petroleum trading partners are not countries with unstable regimes.
• Connect back to the paragraph’s main point:  Palin’s argument is representative of a cohort that believes in the importance of domestic oil production.
• Point to the author’s purpose:  Despite Palin’s (and Republicans’) protests, we argue that offshore drilling presents a more real threat to American security than do foreign regimes.

Thus, depending on where you want to go in the paragraph, you have many options for ways to make connections for your reader. Remember, your reader is not in your brain; and as smart as he or she may be, you still need to make connections that explain the relevance or purpose of included sourced material.

Source Engagement

Simply agreeing or disagreeing does not continue the conversation, nor does it highlight the importance of your findings. Another way of thinking about source engagement is a three-step process: explain, engage, and discuss.

•  Explain  what the author in the source is talking about and why it is important. Do not take it for granted that readers will know why the source material you use is important or significant.

•  Engage  and talk back to the source. Demonstrate an understanding of the source material, and use this to propel your argument. 

•  Discuss  the implications of your response. 

Here is an example of the three-step process:

An important question for both composition instructors and students to address is why new ways of writing ought to be explored. Compositions theorists Flower and Hayes say that “According to many writers, including our subjects, writing often seems a serendipitous experience, as act of discovery. People start out writing without knowing exactly where they will end up: yet they agree that writing is a purposeful act” (286). In other words, not all writers know from the beginning what their final writing product will look like. If writing is indeed a road to discovery, then trying different ways of writing is also a kind of discovery that contributes to the purposeful act of writing. 

Connecting your claims to source material is an important facet of structuring a strong argument. Scholarly and up to date sources give your ideas credibility and authority; just be sure to prioritize your own thoughts over those of your sources.

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Home / Guides / Citation Guides / How to Cite Sources

How to Cite Sources

Here is a complete list for how to cite sources. Most of these guides present citation guidance and examples in MLA, APA, and Chicago.

If you’re looking for general information on MLA or APA citations , the EasyBib Writing Center was designed for you! It has articles on what’s needed in an MLA in-text citation , how to format an APA paper, what an MLA annotated bibliography is, making an MLA works cited page, and much more!

MLA Format Citation Examples

The Modern Language Association created the MLA Style, currently in its 9th edition, to provide researchers with guidelines for writing and documenting scholarly borrowings.  Most often used in the humanities, MLA style (or MLA format ) has been adopted and used by numerous other disciplines, in multiple parts of the world.

MLA provides standard rules to follow so that most research papers are formatted in a similar manner. This makes it easier for readers to comprehend the information. The MLA in-text citation guidelines, MLA works cited standards, and MLA annotated bibliography instructions provide scholars with the information they need to properly cite sources in their research papers, articles, and assignments.

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APA Format Citation Examples

The American Psychological Association created the APA citation style in 1929 as a way to help psychologists, anthropologists, and even business managers establish one common way to cite sources and present content.

APA is used when citing sources for academic articles such as journals, and is intended to help readers better comprehend content, and to avoid language bias wherever possible. The APA style (or APA format ) is now in its 7th edition, and provides citation style guides for virtually any type of resource.

Chicago Style Citation Examples

The Chicago/Turabian style of citing sources is generally used when citing sources for humanities papers, and is best known for its requirement that writers place bibliographic citations at the bottom of a page (in Chicago-format footnotes ) or at the end of a paper (endnotes).

The Turabian and Chicago citation styles are almost identical, but the Turabian style is geared towards student published papers such as theses and dissertations, while the Chicago style provides guidelines for all types of publications. This is why you’ll commonly see Chicago style and Turabian style presented together. The Chicago Manual of Style is currently in its 17th edition, and Turabian’s A Manual for Writers of Research Papers, Theses, and Dissertations is in its 8th edition.

Citing Specific Sources or Events

• Declaration of Independence
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• President Trump’s Inauguration Speech
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6 Interesting Citation Facts

The world of citations may seem cut and dry, but there’s more to them than just specific capitalization rules, MLA in-text citations , and other formatting specifications. Citations have been helping researches document their sources for hundreds of years, and are a great way to learn more about a particular subject area.

Ever wonder what sets all the different styles apart, or how they came to be in the first place? Read on for some interesting facts about citations!

1. There are Over 7,000 Different Citation Styles

You may be familiar with MLA and APA citation styles, but there are actually thousands of citation styles used for all different academic disciplines all across the world. Deciding which one to use can be difficult, so be sure to ask you instructor which one you should be using for your next paper.

2. Some Citation Styles are Named After People

While a majority of citation styles are named for the specific organizations that publish them (i.e. APA is published by the American Psychological Association, and MLA format is named for the Modern Language Association), some are actually named after individuals. The most well-known example of this is perhaps Turabian style, named for Kate L. Turabian, an American educator and writer. She developed this style as a condensed version of the Chicago Manual of Style in order to present a more concise set of rules to students.

3. There are Some Really Specific and Uniquely Named Citation Styles

How specific can citation styles get? The answer is very. For example, the “Flavour and Fragrance Journal” style is based on a bimonthly, peer-reviewed scientific journal published since 1985 by John Wiley & Sons. It publishes original research articles, reviews and special reports on all aspects of flavor and fragrance. Another example is “Nordic Pulp and Paper Research,” a style used by an international scientific magazine covering science and technology for the areas of wood or bio-mass constituents.

4. More citations were created on  EasyBib.com  in the first quarter of 2018 than there are people in California.

The US Census Bureau estimates that approximately 39.5 million people live in the state of California. Meanwhile, about 43 million citations were made on EasyBib from January to March of 2018. That’s a lot of citations.

5. “Citations” is a Word With a Long History

The word “citations” can be traced back literally thousands of years to the Latin word “citare” meaning “to summon, urge, call; put in sudden motion, call forward; rouse, excite.” The word then took on its more modern meaning and relevance to writing papers in the 1600s, where it became known as the “act of citing or quoting a passage from a book, etc.”

6. Citation Styles are Always Changing

The concept of citations always stays the same. It is a means of preventing plagiarism and demonstrating where you relied on outside sources. The specific style rules, however, can and do change regularly. For example, in 2018 alone, 46 new citation styles were introduced , and 106 updates were made to exiting styles. At EasyBib, we are always on the lookout for ways to improve our styles and opportunities to add new ones to our list.

Why Citations Matter

Here are the ways accurate citations can help your students achieve academic success, and how you can answer the dreaded question, “why should I cite my sources?”

They Give Credit to the Right People

Citing their sources makes sure that the reader can differentiate the student’s original thoughts from those of other researchers. Not only does this make sure that the sources they use receive proper credit for their work, it ensures that the student receives deserved recognition for their unique contributions to the topic. Whether the student is citing in MLA format , APA format , or any other style, citations serve as a natural way to place a student’s work in the broader context of the subject area, and serve as an easy way to gauge their commitment to the project.

They Provide Hard Evidence of Ideas

Having many citations from a wide variety of sources related to their idea means that the student is working on a well-researched and respected subject. Citing sources that back up their claim creates room for fact-checking and further research . And, if they can cite a few sources that have the converse opinion or idea, and then demonstrate to the reader why they believe that that viewpoint is wrong by again citing credible sources, the student is well on their way to winning over the reader and cementing their point of view.

They Promote Originality and Prevent Plagiarism

The point of research projects is not to regurgitate information that can already be found elsewhere. We have Google for that! What the student’s project should aim to do is promote an original idea or a spin on an existing idea, and use reliable sources to promote that idea. Copying or directly referencing a source without proper citation can lead to not only a poor grade, but accusations of academic dishonesty. By citing their sources regularly and accurately, students can easily avoid the trap of plagiarism , and promote further research on their topic.

They Create Better Researchers

By researching sources to back up and promote their ideas, students are becoming better researchers without even knowing it! Each time a new source is read or researched, the student is becoming more engaged with the project and is developing a deeper understanding of the subject area. Proper citations demonstrate a breadth of the student’s reading and dedication to the project itself. By creating citations, students are compelled to make connections between their sources and discern research patterns. Each time they complete this process, they are helping themselves become better researchers and writers overall.

When is the Right Time to Start Making Citations?

Make in-text/parenthetical citations as you need them.

As you are writing your paper, be sure to include references within the text that correspond with references in a works cited or bibliography. These are usually called in-text citations or parenthetical citations in MLA and APA formats. The most effective time to complete these is directly after you have made your reference to another source. For instance, after writing the line from Charles Dickens’ A Tale of Two Cities : “It was the best of times, it was the worst of times…,” you would include a citation like this (depending on your chosen citation style):

(Dickens 11).

This signals to the reader that you have referenced an outside source. What’s great about this system is that the in-text citations serve as a natural list for all of the citations you have made in your paper, which will make completing the works cited page a whole lot easier. After you are done writing, all that will be left for you to do is scan your paper for these references, and then build a works cited page that includes a citation for each one.

Need help creating an MLA works cited page ? Try the MLA format generator on EasyBib.com! We also have a guide on how to format an APA reference page .

2. Understand the General Formatting Rules of Your Citation Style Before You Start Writing

While reading up on paper formatting may not sound exciting, being aware of how your paper should look early on in the paper writing process is super important. Citation styles can dictate more than just the appearance of the citations themselves, but rather can impact the layout of your paper as a whole, with specific guidelines concerning margin width, title treatment, and even font size and spacing. Knowing how to organize your paper before you start writing will ensure that you do not receive a low grade for something as trivial as forgetting a hanging indent.

Don’t know where to start? Here’s a formatting guide on APA format .

3. Double-check All of Your Outside Sources for Relevance and Trustworthiness First

Collecting outside sources that support your research and specific topic is a critical step in writing an effective paper. But before you run to the library and grab the first 20 books you can lay your hands on, keep in mind that selecting a source to include in your paper should not be taken lightly. Before you proceed with using it to backup your ideas, run a quick Internet search for it and see if other scholars in your field have written about it as well. Check to see if there are book reviews about it or peer accolades. If you spot something that seems off to you, you may want to consider leaving it out of your work. Doing this before your start making citations can save you a ton of time in the long run.

Finished with your paper? It may be time to run it through a grammar and plagiarism checker , like the one offered by EasyBib Plus. If you’re just looking to brush up on the basics, our grammar guides  are ready anytime you are.

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Using Research and Evidence

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What type of evidence should I use?

There are two types of evidence.

First hand research is research you have conducted yourself such as interviews, experiments, surveys, or personal experience and anecdotes.

Second hand research is research you are getting from various texts that has been supplied and compiled by others such as books, periodicals, and Web sites.

Regardless of what type of sources you use, they must be credible. In other words, your sources must be reliable, accurate, and trustworthy.

How do I know if a source is credible?

You can ask the following questions to determine if a source is credible.

Who is the author? Credible sources are written by authors respected in their fields of study. Responsible, credible authors will cite their sources so that you can check the accuracy of and support for what they've written. (This is also a good way to find more sources for your own research.)

How recent is the source? The choice to seek recent sources depends on your topic. While sources on the American Civil War may be decades old and still contain accurate information, sources on information technologies, or other areas that are experiencing rapid changes, need to be much more current.

What is the author's purpose? When deciding which sources to use, you should take the purpose or point of view of the author into consideration. Is the author presenting a neutral, objective view of a topic? Or is the author advocating one specific view of a topic? Who is funding the research or writing of this source? A source written from a particular point of view may be credible; however, you need to be careful that your sources don't limit your coverage of a topic to one side of a debate.

What type of sources does your audience value? If you are writing for a professional or academic audience, they may value peer-reviewed journals as the most credible sources of information. If you are writing for a group of residents in your hometown, they might be more comfortable with mainstream sources, such as Time or Newsweek . A younger audience may be more accepting of information found on the Internet than an older audience might be.

Be especially careful when evaluating Internet sources! Never use Web sites where an author cannot be determined, unless the site is associated with a reputable institution such as a respected university, a credible media outlet, government program or department, or well-known non-governmental organizations. Beware of using sites like Wikipedia , which are collaboratively developed by users. Because anyone can add or change content, the validity of information on such sites may not meet the standards for academic research.

APA In-Text Citations and Sample Essay 7th Edition

This handout focuses on how to format in-text citations in APA.

Proper citation of sources is a two-part process . You must first cite each source in the body of your essay; these citations within the essay are called in-text citations . You MUST cite all quoted, paraphrased, or summarized words, ideas, and facts from sources. Without in-text citations, you are technically in danger of plagiarism, even if you have listed your sources at the end of the essay.

In-text citations point the reader to the sources’ information on the references page. The in-text citation typically includes the author's last name and the year of publication. If you use a direct quote, the page number is also provided.

More information can be found on p. 253 of the 7th edition of the Publication Manual of the American Psychological Association.

Citation Rules

Direct quotation with the author named in the text.

Heinze and Lu (2017) stated, “The NFL shifted its responses to institutional change around concussions significantly as the field itself evolved” (p. 509).

Note: The year of publication is listed in parenthesis after the names of the authors, and the page number is listed in parenthesis at the end of the quote.

Direct Quotation without the Author Named in the Text

As the NFL developed as an organization, it “shifted its responses to institutional change around concussions significantly” (Heinze & Lu, 2017, p. 509).

Note: At the end of the quote, the names of the authors, year of publication, and page number are listed in parenthesis.

Paraphrase with 1-2 Authors

As the NFL developed as an organization, its reactions toward concussions also transformed (Heinze & Lu, 2017).

Note: For paraphrases, page numbers are encouraged but not required.

Paraphrase with 3 or More Authors

To work toward solving the issue of violence in prisons begins with determining aspects that might connect with prisoners' violent conduct (Thomson et al., 2019).

Direct Quotation without an Author

The findings were astonishing "in a recent study of parent and adult child relationships" ("Parents and Their Children," 2007, p. 2).

Note: Since the author of the text is not stated, a shortened version of the title is used instead.

Secondary Sources

When using secondary sources, use the phrase "as cited in" and cite the secondary source on the References page.

In 1936, Keynes said, “governments should run deficits when the economy is slow to avoid unemployment” (as cited in Richardson, 2008, p. 257).

Long (Block) Quotations

When using direct quotations of 40 or more words, indent five spaces from the left margin without using quotation marks. The final period should come before the parenthetical citation.

At Meramec, an English department policy states:

To honor and protect their own work and that of others, all students must give credit to proprietary sources that are used for course work. It is assumed that any information that is not documented is either common knowledge in that field or the original work of that student. (St. Louis Community College, 2001, p. 1)

Website Citations

If citing a specific web document without a page number, include the name of the author, date, title of the section, and paragraph number in parentheses:

In America, “Two out of five deaths among U.S. teens are the result of a motor vehicle crash” (National Center for Injury Prevention and Control, 2004, Overview section, para. 1).

Here is a print-friendly version of this content.

Learn more about the APA References page by reviewing this handout .

For information on STLCC's academic integrity policy, check out this webpage .

For additional information on APA, check out STLCC's LibGuide on APA .

Sample Essay

A sample APA essay is available at this link .

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• Knowledge Base
• Referencing

A Quick Guide to Referencing | Cite Your Sources Correctly

Referencing means acknowledging the sources you have used in your writing. Including references helps you support your claims and ensures that you avoid plagiarism .

There are many referencing styles, but they usually consist of two things:

• A citation wherever you refer to a source in your text.
• A reference list or bibliography at the end listing full details of all your sources.

The most common method of referencing in UK universities is Harvard style , which uses author-date citations in the text. Our free Harvard Reference Generator automatically creates accurate references in this style.

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Table of contents

Referencing styles, citing your sources with in-text citations, creating your reference list or bibliography, harvard referencing examples, frequently asked questions about referencing.

Each referencing style has different rules for presenting source information. For in-text citations, some use footnotes or endnotes , while others include the author’s surname and date of publication in brackets in the text.

The reference list or bibliography is presented differently in each style, with different rules for things like capitalisation, italics, and quotation marks in references.

Your university will usually tell you which referencing style to use; they may even have their own unique style. Always follow your university’s guidelines, and ask your tutor if you are unsure. The most common styles are summarised below.

Harvard referencing, the most commonly used style at UK universities, uses author–date in-text citations corresponding to an alphabetical bibliography or reference list at the end.

Harvard Referencing Guide

Vancouver referencing, used in biomedicine and other sciences, uses reference numbers in the text corresponding to a numbered reference list at the end.

Vancouver Referencing Guide

APA referencing, used in the social and behavioural sciences, uses author–date in-text citations corresponding to an alphabetical reference list at the end.

APA Referencing Guide APA Reference Generator

MHRA referencing, used in the humanities, uses footnotes in the text with source information, in addition to an alphabetised bibliography at the end.

MHRA Referencing Guide

OSCOLA referencing, used in law, uses footnotes in the text with source information, and an alphabetical bibliography at the end in longer texts.

OSCOLA Referencing Guide

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In-text citations should be used whenever you quote, paraphrase, or refer to information from a source (e.g. a book, article, image, website, or video).

Quoting and paraphrasing

Quoting is when you directly copy some text from a source and enclose it in quotation marks to indicate that it is not your own writing.

Paraphrasing is when you rephrase the original source into your own words. In this case, you don’t use quotation marks, but you still need to include a citation.

In most referencing styles, page numbers are included when you’re quoting or paraphrasing a particular passage. If you are referring to the text as a whole, no page number is needed.

In-text citations

In-text citations are quick references to your sources. In Harvard referencing, you use the author’s surname and the date of publication in brackets.

Up to three authors are included in a Harvard in-text citation. If the source has more than three authors, include the first author followed by ‘ et al. ‘

The point of these citations is to direct your reader to the alphabetised reference list, where you give full information about each source. For example, to find the source cited above, the reader would look under ‘J’ in your reference list to find the title and publication details of the source.

Placement of in-text citations

In-text citations should be placed directly after the quotation or information they refer to, usually before a comma or full stop. If a sentence is supported by multiple sources, you can combine them in one set of brackets, separated by a semicolon.

If you mention the author’s name in the text already, you don’t include it in the citation, and you can place the citation immediately after the name.

• Another researcher warns that the results of this method are ‘inconsistent’ (Singh, 2018, p. 13) .
• Previous research has frequently illustrated the pitfalls of this method (Singh, 2018; Jones, 2016) .
• Singh (2018, p. 13) warns that the results of this method are ‘inconsistent’.

The terms ‘bibliography’ and ‘reference list’ are sometimes used interchangeably. Both refer to a list that contains full information on all the sources cited in your text. Sometimes ‘bibliography’ is used to mean a more extensive list, also containing sources that you consulted but did not cite in the text.

A reference list or bibliography is usually mandatory, since in-text citations typically don’t provide full source information. For styles that already include full source information in footnotes (e.g. OSCOLA and Chicago Style ), the bibliography is optional, although your university may still require you to include one.

Format of the reference list

Reference lists are usually alphabetised by authors’ last names. Each entry in the list appears on a new line, and a hanging indent is applied if an entry extends onto multiple lines.

Different source information is included for different source types. Each style provides detailed guidelines for exactly what information should be included and how it should be presented.

Below are some examples of reference list entries for common source types in Harvard style.

• Chapter of a book
• Journal article

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Your university should tell you which referencing style to follow. If you’re unsure, check with a supervisor. Commonly used styles include:

• Harvard referencing , the most commonly used style in UK universities.
• MHRA , used in humanities subjects.
• APA , used in the social sciences.
• Vancouver , used in biomedicine.
• OSCOLA , used in law.

Your university may have its own referencing style guide.

If you are allowed to choose which style to follow, we recommend Harvard referencing, as it is a straightforward and widely used style.

References should be included in your text whenever you use words, ideas, or information from a source. A source can be anything from a book or journal article to a website or YouTube video.

If you don’t acknowledge your sources, you can get in trouble for plagiarism .

To avoid plagiarism , always include a reference when you use words, ideas or information from a source. This shows that you are not trying to pass the work of others off as your own.

You must also properly quote or paraphrase the source. If you’re not sure whether you’ve done this correctly, you can use the Scribbr Plagiarism Checker to find and correct any mistakes.

Harvard referencing uses an author–date system. Sources are cited by the author’s last name and the publication year in brackets. Each Harvard in-text citation corresponds to an entry in the alphabetised reference list at the end of the paper.

Vancouver referencing uses a numerical system. Sources are cited by a number in parentheses or superscript. Each number corresponds to a full reference at the end of the paper.

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Appropriate Level of Citation

The number of sources you cite in your paper depends on the purpose of your work. For most papers, cite one or two of the most representative sources for each key point. Literature review papers, however, typically include a more exhaustive list of references.

Provide appropriate credit to the source (e.g., by using an in-text citation) whenever you do the following:

• paraphrase (i.e., state in your own words) the ideas of others
• directly quote the words of others
• refer to data or data sets
• reprint or adapt a table or figure, even images from the internet that are free or licensed in the Creative Commons
• reprint a long text passage or commercially copyrighted test item

Avoid both undercitation and overcitation. Undercitation can lead to plagiarism and/or self-plagiarism . Overcitation can be distracting and is unnecessary.

For example, it is considered overcitation to repeat the same citation in every sentence when the source and topic have not changed. Instead, when paraphrasing a key point in more than one sentence within a paragraph, cite the source in the first sentence in which it is relevant and do not repeat the citation in subsequent sentences as long as the source remains clear and unchanged.

Figure 8.1 in Chapter 8 of the Publication Manual provides an example of an appropriate level of citation.

Determining the appropriate level of citation is covered in the seventh edition APA Style manuals in the Publication Manual Section 8.1 and the Concise Guide Section 8.1

Related handouts

• In-Text Citation Checklist (PDF, 227KB)
• Six Steps to Proper Citation (PDF, 112KB)

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Using evidence.

Like a lawyer in a jury trial, a writer must convince her audience of the validity of her argument by using evidence effectively. As a writer, you must also use evidence to persuade your readers to accept your claims. But how do you use evidence to your advantage? By leading your reader through your reasoning.

The types of evidence you use change from discipline to discipline--you might use quotations from a poem or a literary critic, for example, in a literature paper; you might use data from an experiment in a lab report.

The process of putting together your argument is called analysis --it interprets evidence in order to support, test, and/or refine a claim . The chief claim in an analytical essay is called the thesis . A thesis provides the controlling idea for a paper and should be original (that is, not completely obvious), assertive, and arguable. A strong thesis also requires solid evidence to support and develop it because without evidence, a claim is merely an unsubstantiated idea or opinion.

This Web page will cover these basic issues (you can click or scroll down to a particular topic):

• Incorporating evidence effectively.
• Integrating quotations smoothly.
• Citing your sources.

Incorporating Evidence Into Your Essay

When should you incorporate evidence.

Once you have formulated your claim, your thesis (see the WTS pamphlet, " How to Write a Thesis Statement ," for ideas and tips), you should use evidence to help strengthen your thesis and any assertion you make that relates to your thesis. Here are some ways to work evidence into your writing:

• Offer evidence that agrees with your stance up to a point, then add to it with ideas of your own.
• Present evidence that contradicts your stance, and then argue against (refute) that evidence and therefore strengthen your position.
• Use sources against each other, as if they were experts on a panel discussing your proposition.
• Use quotations to support your assertion, not merely to state or restate your claim.

Weak and Strong Uses of Evidence

In order to use evidence effectively, you need to integrate it smoothly into your essay by following this pattern:

• State your claim.
• Give your evidence, remembering to relate it to the claim.
• Comment on the evidence to show how it supports the claim.

To see the differences between strong and weak uses of evidence, here are two paragraphs.

Weak use of evidence

Today, we are too self-centered. Most families no longer sit down to eat together, preferring instead to eat on the go while rushing to the next appointment (Gleick 148). Everything is about what we want.

This is a weak example of evidence because the evidence is not related to the claim. What does the claim about self-centeredness have to do with families eating together? The writer doesn't explain the connection.

The same evidence can be used to support the same claim, but only with the addition of a clear connection between claim and evidence, and some analysis of the evidence cited.

Stronger use of evidence

Today, Americans are too self-centered. Even our families don't matter as much anymore as they once did. Other people and activities take precedence. In fact, the evidence shows that most American families no longer eat together, preferring instead to eat on the go while rushing to the next appointment (Gleick 148). Sit-down meals are a time to share and connect with others; however, that connection has become less valued, as families begin to prize individual activities over shared time, promoting self-centeredness over group identity.

This is a far better example, as the evidence is more smoothly integrated into the text, the link between the claim and the evidence is strengthened, and the evidence itself is analyzed to provide support for the claim.

Using Quotations: A Special Type of Evidence

One effective way to support your claim is to use quotations. However, because quotations involve someone else's words, you need to take special care to integrate this kind of evidence into your essay. Here are two examples using quotations, one less effective and one more so.

Ineffective Use of Quotation

Today, we are too self-centered. "We are consumers-on-the-run . . . the very notion of the family meal as a sit-down occasion is vanishing. Adults and children alike eat . . . on the way to their next activity" (Gleick 148). Everything is about what we want.

This example is ineffective because the quotation is not integrated with the writer's ideas. Notice how the writer has dropped the quotation into the paragraph without making any connection between it and the claim. Furthermore, she has not discussed the quotation's significance, which makes it difficult for the reader to see the relationship between the evidence and the writer's point.

A More Effective Use of Quotation

Today, Americans are too self-centered. Even our families don't matter as much any more as they once did. Other people and activities take precedence, as James Gleick says in his book, Faster . "We are consumers-on-the-run . . . the very notion of the family meal as a sit-down occasion is vanishing. Adults and children alike eat . . . on the way to their next activity" (148). Sit-down meals are a time to share and connect with others; however, that connection has become less valued, as families begin to prize individual activities over shared time, promoting self-centeredness over group identity.

The second example is more effective because it follows the guidelines for incorporating evidence into an essay. Notice, too, that it uses a lead-in phrase (". . . as James Gleick says in his book, Faster ") to introduce the direct quotation. This lead-in phrase helps to integrate the quotation with the writer's ideas. Also notice that the writer discusses and comments upon the quotation immediately afterwards, which allows the reader to see the quotation's connection to the writer's point.

REMEMBER: Discussing the significance of your evidence develops and expands your paper!

Citing Your Sources

Evidence appears in essays in the form of quotations and paraphrasing. Both forms of evidence must be cited in your text. Citing evidence means distinguishing other writers' information from your own ideas and giving credit to your sources. There are plenty of general ways to do citations. Note both the lead-in phrases and the punctuation (except the brackets) in the following examples:

Quoting: According to Source X, "[direct quotation]" ([date or page #]).

Paraphrasing: Although Source Z argues that [his/her point in your own words], a better way to view the issue is [your own point] ([citation]).

Summarizing: In her book, Source P's main points are Q, R, and S [citation].

Your job during the course of your essay is to persuade your readers that your claims are feasible and are the most effective way of interpreting the evidence.

Questions to Ask Yourself When Revising Your Paper

• Have I offered my reader evidence to substantiate each assertion I make in my paper?
• Do I thoroughly explain why/how my evidence backs up my ideas?
• Do I avoid generalizing in my paper by specifically explaining how my evidence is representative?
• Do I provide evidence that not only confirms but also qualifies my paper's main claims?
• Do I use evidence to test and evolve my ideas, rather than to just confirm them?
• Do I cite my sources thoroughly and correctly?

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How to Introduce Evidence in an Essay

Last Updated: May 5, 2024

This article was co-authored by Tristen Bonacci . Tristen Bonacci is a Licensed English Teacher with more than 20 years of experience. Tristen has taught in both the United States and overseas. She specializes in teaching in a secondary education environment and sharing wisdom with others, no matter the environment. Tristen holds a BA in English Literature from The University of Colorado and an MEd from The University of Phoenix. This article has been viewed 243,258 times.

When well integrated into your argument, evidence helps prove that you've done your research and thought critically about your topic. But what's the best way to introduce evidence so it feels seamless and has the highest impact? There are actually quite a few effective strategies you can use, and we've rounded up the best ones for you here. Try some of the tips below to introduce evidence in your essay and make a persuasive argument.

Things You Should Know

• "According to..."
• "The text says..."
• "Researchers have learned..."
• "For example..."
• "[Author's name] writes..."

Setting up the Evidence

• You can use 1-2 sentences to set up the evidence, if needed, but usually more concise you are, the better.

• For example, you may make an argument like, “Desire is a complicated, confusing emotion that causes pain to others.”
• Or you may make an assertion like, “The treatment of addiction must consider root cause issues like mental health and poor living conditions.”

• For example, you may write, “The novel explores the theme of adolescent love and desire.”
• Or you may write, “Many studies show that addiction is a mental health issue.”

Putting in the Evidence

• For example, you may use an introductory clause like, “According to Anne Carson…”, "In the following chart...," “The author states…," "The survey shows...." or “The study argues…”
• Place a comma after the introductory clause if you are using a quote. For example, “According to Anne Carson, ‘Desire is no light thing" or "The study notes, 'levels of addiction rise as levels of poverty and homelessness also rise.'"
• A list of introductory clauses can be found here: https://student.unsw.edu.au/introducing-quotations-and-paraphrases .

• For example, you may write, “In the novel, Carson is never shy about how her characters express desire for each other: ‘When they made love/ Geryon liked to touch in slow succession each of the bones of Herakles' back…’”
• Or you may write, "The study charts the rise in addiction levels, concluding: 'There is a higher level of addiction in specific areas of the United States.'"

• For example, you may write, “Carson views events as inevitable, as man moving through time like “a harpoon,” much like the fates of her characters.”
• Or you may write, "The chart indicates the rising levels of addiction in young people, an "epidemic" that shows no sign of slowing down."

• For example, you may write in the first mention, “In Anne Carson’s The Autobiography of Red , the color red signifies desire, love, and monstrosity.” Or you may write, "In the study Addiction Rates conducted by the Harvard Review...".
• After the first mention, you can write, “Carson states…” or “The study explores…”.
• If you are citing the author’s name in-text as part of your citation style, you do not need to note their name in the text. You can just use the quote and then place the citation at the end.

• If you are paraphrasing a source, you may still use quotation marks around any text you are lifting directly from the source.

• For example, you may write, “In the novel, the characters express desire for each other: ‘When they made love/ Geryon liked to touch in slow succession each of the bones of Herakles' back (Carson, 48).”
• Or you may write, "Based on the data in the graph below, the study shows the 'intersection between opioid addiction and income' (Branson, 10)."
• If you are using footnotes or endnotes, make sure you use the appropriate citation for each piece of evidence you place in your essay.

• You may also mention the title of the work or source you are paraphrasing or summarizing and the author's name in the paraphrase or summary.
• For example, you may write a paraphrase like, "As noted in various studies, the correlation between addiction and mental illness is often ignored by medical health professionals (Deder, 10)."
• Or you may write a summary like, " The Autobiography of Red is an exploration of desire and love between strange beings, what critics have called a hybrid work that combines ancient meter with modern language (Zambreno, 15)."

• The only time you should place 2 pieces of evidence together is when you want to directly compare 2 short quotes (each less than 1 line long).
• Your analysis should then include a complete compare and contrast of the 2 quotes to show you have thought critically about them both.

Analyzing the Evidence

• For example, you may write, “In the novel, Carson is never shy about how her characters express desire for each other: ‘When they made love/ Geryon liked to touch in slow succession each of the bones of Herakles' back (Carson, 48). The connection between Geryon and Herakles is intimate and gentle, a love that connects the two characters in a physical and emotional way.”
• Or you may write, "In the study Addiction Rates conducted by the Harvard Review, the data shows a 50% rise in addiction levels in specific areas across the United States. The study illustrates a clear connection between addiction levels and communities where income falls below the poverty line and there is a housing shortage or crisis."

• For example, you may write, “Carson’s treatment of the relationship between Geryon and Herakles can be linked back to her approach to desire as a whole in the novel, which acts as both a catalyst and an impediment for her characters.”
• Or you may write, "The survey conducted by Dr. Paula Bronson, accompanied by a detailed academic dissertation, supports the argument that addiction is not a stand alone issue that can be addressed in isolation."

• For example, you may write, “The value of love between two people is not romanticized, but it is still considered essential, similar to the feeling of belonging, another key theme in the novel.”
• Or you may write, "There is clearly a need to reassess the current thinking around addiction and mental illness so the health and sciences community can better study these pressing issues."

Expert Q&A

You Might Also Like

• ↑ Tristen Bonacci. Licensed English Teacher. Expert Interview. 21 December 2021.
• ↑ https://writing.wisc.edu/handbook/assignments/quoliterature/
• ↑ https://writingcenter.unc.edu/tips-and-tools/evidence/
• ↑ https://wts.indiana.edu/writing-guides/using-evidence.html

About This Article

Before you introduce evidence into your essay, begin the paragraph with a topic sentence. This sentence should give the reader an overview of the point you’ll be arguing or making with the evidence. When you get to citing the evidence, begin the sentence with a clause like, “The study finds” or “According to Anne Carson.” You can also include a short quotation in the middle of a sentence without introducing it with a clause. Remember to introduce the author’s first and last name when you use the evidence for the first time. Afterwards, you can just mention their last name. Once you’ve presented the evidence, take time to explain in your own words how it backs up the point you’re making. For tips on how to reference your evidence correctly, keep reading! Did this summary help you? Yes No

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What this handout is about

This handout will provide a broad overview of gathering and using evidence. It will help you decide what counts as evidence, put evidence to work in your writing, and determine whether you have enough evidence. It will also offer links to additional resources.

Introduction

Many papers that you write in college will require you to make an argument ; this means that you must take a position on the subject you are discussing and support that position with evidence. It’s important that you use the right kind of evidence, that you use it effectively, and that you have an appropriate amount of it. If, for example, your philosophy professor didn’t like it that you used a survey of public opinion as your primary evidence in your ethics paper, you need to find out more about what philosophers count as good evidence. If your instructor has told you that you need more analysis, suggested that you’re “just listing” points or giving a “laundry list,” or asked you how certain points are related to your argument, it may mean that you can do more to fully incorporate your evidence into your argument. Comments like “for example?,” “proof?,” “go deeper,” or “expand” in the margins of your graded paper suggest that you may need more evidence. Let’s take a look at each of these issues—understanding what counts as evidence, using evidence in your argument, and deciding whether you need more evidence.

What counts as evidence?

Before you begin gathering information for possible use as evidence in your argument, you need to be sure that you understand the purpose of your assignment. If you are working on a project for a class, look carefully at the assignment prompt. It may give you clues about what sorts of evidence you will need. Does the instructor mention any particular books you should use in writing your paper or the names of any authors who have written about your topic? How long should your paper be (longer works may require more, or more varied, evidence)? What themes or topics come up in the text of the prompt? Our handout on understanding writing assignments can help you interpret your assignment. It’s also a good idea to think over what has been said about the assignment in class and to talk with your instructor if you need clarification or guidance.

What matters to instructors?

Instructors in different academic fields expect different kinds of arguments and evidence—your chemistry paper might include graphs, charts, statistics, and other quantitative data as evidence, whereas your English paper might include passages from a novel, examples of recurring symbols, or discussions of characterization in the novel. Consider what kinds of sources and evidence you have seen in course readings and lectures. You may wish to see whether the Writing Center has a handout regarding the specific academic field you’re working in—for example, literature , sociology , or history .

What are primary and secondary sources?

A note on terminology: many researchers distinguish between primary and secondary sources of evidence (in this case, “primary” means “first” or “original,” not “most important”). Primary sources include original documents, photographs, interviews, and so forth. Secondary sources present information that has already been processed or interpreted by someone else. For example, if you are writing a paper about the movie “The Matrix,” the movie itself, an interview with the director, and production photos could serve as primary sources of evidence. A movie review from a magazine or a collection of essays about the film would be secondary sources. Depending on the context, the same item could be either a primary or a secondary source: if I am writing about people’s relationships with animals, a collection of stories about animals might be a secondary source; if I am writing about how editors gather diverse stories into collections, the same book might now function as a primary source.

Where can I find evidence?

Here are some examples of sources of information and tips about how to use them in gathering evidence. Ask your instructor if you aren’t sure whether a certain source would be appropriate for your paper.

Print and electronic sources

Books, journals, websites, newspapers, magazines, and documentary films are some of the most common sources of evidence for academic writing. Our handout on evaluating print sources will help you choose your print sources wisely, and the library has a tutorial on evaluating both print sources and websites. A librarian can help you find sources that are appropriate for the type of assignment you are completing. Just visit the reference desk at Davis or the Undergraduate Library or chat with a librarian online (the library’s IM screen name is undergradref).

Observation

Sometimes you can directly observe the thing you are interested in, by watching, listening to, touching, tasting, or smelling it. For example, if you were asked to write about Mozart’s music, you could listen to it; if your topic was how businesses attract traffic, you might go and look at window displays at the mall.

An interview is a good way to collect information that you can’t find through any other type of research. An interview can provide an expert’s opinion, biographical or first-hand experiences, and suggestions for further research.

Surveys allow you to find out some of what a group of people thinks about a topic. Designing an effective survey and interpreting the data you get can be challenging, so it’s a good idea to check with your instructor before creating or administering a survey.

Experiments

Experimental data serve as the primary form of scientific evidence. For scientific experiments, you should follow the specific guidelines of the discipline you are studying. For writing in other fields, more informal experiments might be acceptable as evidence. For example, if you want to prove that food choices in a cafeteria are affected by gender norms, you might ask classmates to undermine those norms on purpose and observe how others react. What would happen if a football player were eating dinner with his teammates and he brought a small salad and diet drink to the table, all the while murmuring about his waistline and wondering how many fat grams the salad dressing contained?

Personal experience

Using your own experiences can be a powerful way to appeal to your readers. You should, however, use personal experience only when it is appropriate to your topic, your writing goals, and your audience. Personal experience should not be your only form of evidence in most papers, and some disciplines frown on using personal experience at all. For example, a story about the microscope you received as a Christmas gift when you were nine years old is probably not applicable to your biology lab report.

Using evidence in an argument

Does evidence speak for itself.

Absolutely not. After you introduce evidence into your writing, you must say why and how this evidence supports your argument. In other words, you have to explain the significance of the evidence and its function in your paper. What turns a fact or piece of information into evidence is the connection it has with a larger claim or argument: evidence is always evidence for or against something, and you have to make that link clear.

As writers, we sometimes assume that our readers already know what we are talking about; we may be wary of elaborating too much because we think the point is obvious. But readers can’t read our minds: although they may be familiar with many of the ideas we are discussing, they don’t know what we are trying to do with those ideas unless we indicate it through explanations, organization, transitions, and so forth. Try to spell out the connections that you were making in your mind when you chose your evidence, decided where to place it in your paper, and drew conclusions based on it. Remember, you can always cut prose from your paper later if you decide that you are stating the obvious.

Here are some questions you can ask yourself about a particular bit of evidence:

• OK, I’ve just stated this point, but so what? Why is it interesting? Why should anyone care?
• What does this information imply?
• What are the consequences of thinking this way or looking at a problem this way?
• I’ve just described what something is like or how I see it, but why is it like that?
• I’ve just said that something happens—so how does it happen? How does it come to be the way it is?
• Why is this information important? Why does it matter?
• How is this idea related to my thesis? What connections exist between them? Does it support my thesis? If so, how does it do that?
• Can I give an example to illustrate this point?

Answering these questions may help you explain how your evidence is related to your overall argument.

How can I incorporate evidence into my paper?

There are many ways to present your evidence. Often, your evidence will be included as text in the body of your paper, as a quotation, paraphrase, or summary. Sometimes you might include graphs, charts, or tables; excerpts from an interview; or photographs or illustrations with accompanying captions.

When you quote, you are reproducing another writer’s words exactly as they appear on the page. Here are some tips to help you decide when to use quotations:

• Quote if you can’t say it any better and the author’s words are particularly brilliant, witty, edgy, distinctive, a good illustration of a point you’re making, or otherwise interesting.
• Quote if you are using a particularly authoritative source and you need the author’s expertise to back up your point.
• Quote if you are analyzing diction, tone, or a writer’s use of a specific word or phrase.
• Quote if you are taking a position that relies on the reader’s understanding exactly what another writer says about the topic.

Be sure to introduce each quotation you use, and always cite your sources. See our handout on quotations for more details on when to quote and how to format quotations.

Like all pieces of evidence, a quotation can’t speak for itself. If you end a paragraph with a quotation, that may be a sign that you have neglected to discuss the importance of the quotation in terms of your argument. It’s important to avoid “plop quotations,” that is, quotations that are just dropped into your paper without any introduction, discussion, or follow-up.

Paraphrasing

When you paraphrase, you take a specific section of a text and put it into your own words. Putting it into your own words doesn’t mean just changing or rearranging a few of the author’s words: to paraphrase well and avoid plagiarism, try setting your source aside and restating the sentence or paragraph you have just read, as though you were describing it to another person. Paraphrasing is different than summary because a paraphrase focuses on a particular, fairly short bit of text (like a phrase, sentence, or paragraph). You’ll need to indicate when you are paraphrasing someone else’s text by citing your source correctly, just as you would with a quotation.

When might you want to paraphrase?

• Paraphrase when you want to introduce a writer’s position, but their original words aren’t special enough to quote.
• Paraphrase when you are supporting a particular point and need to draw on a certain place in a text that supports your point—for example, when one paragraph in a source is especially relevant.
• Paraphrase when you want to present a writer’s view on a topic that differs from your position or that of another writer; you can then refute writer’s specific points in your own words after you paraphrase.
• Paraphrase when you want to comment on a particular example that another writer uses.
• Paraphrase when you need to present information that’s unlikely to be questioned.

When you summarize, you are offering an overview of an entire text, or at least a lengthy section of a text. Summary is useful when you are providing background information, grounding your own argument, or mentioning a source as a counter-argument. A summary is less nuanced than paraphrased material. It can be the most effective way to incorporate a large number of sources when you don’t have a lot of space. When you are summarizing someone else’s argument or ideas, be sure this is clear to the reader and cite your source appropriately.

Statistics, data, charts, graphs, photographs, illustrations

Sometimes the best evidence for your argument is a hard fact or visual representation of a fact. This type of evidence can be a solid backbone for your argument, but you still need to create context for your reader and draw the connections you want them to make. Remember that statistics, data, charts, graph, photographs, and illustrations are all open to interpretation. Guide the reader through the interpretation process. Again, always, cite the origin of your evidence if you didn’t produce the material you are using yourself.

Do I need more evidence?

Let’s say that you’ve identified some appropriate sources, found some evidence, explained to the reader how it fits into your overall argument, incorporated it into your draft effectively, and cited your sources. How do you tell whether you’ve got enough evidence and whether it’s working well in the service of a strong argument or analysis? Here are some techniques you can use to review your draft and assess your use of evidence.

Make a reverse outline

A reverse outline is a great technique for helping you see how each paragraph contributes to proving your thesis. When you make a reverse outline, you record the main ideas in each paragraph in a shorter (outline-like) form so that you can see at a glance what is in your paper. The reverse outline is helpful in at least three ways. First, it lets you see where you have dealt with too many topics in one paragraph (in general, you should have one main idea per paragraph). Second, the reverse outline can help you see where you need more evidence to prove your point or more analysis of that evidence. Third, the reverse outline can help you write your topic sentences: once you have decided what you want each paragraph to be about, you can write topic sentences that explain the topics of the paragraphs and state the relationship of each topic to the overall thesis of the paper.

For tips on making a reverse outline, see our handout on organization .

Color code your paper

You will need three highlighters or colored pencils for this exercise. Use one color to highlight general assertions. These will typically be the topic sentences in your paper. Next, use another color to highlight the specific evidence you provide for each assertion (including quotations, paraphrased or summarized material, statistics, examples, and your own ideas). Lastly, use another color to highlight analysis of your evidence. Which assertions are key to your overall argument? Which ones are especially contestable? How much evidence do you have for each assertion? How much analysis? In general, you should have at least as much analysis as you do evidence, or your paper runs the risk of being more summary than argument. The more controversial an assertion is, the more evidence you may need to provide in order to persuade your reader.

Play devil’s advocate, act like a child, or doubt everything

This technique may be easiest to use with a partner. Ask your friend to take on one of the roles above, then read your paper aloud to them. After each section, pause and let your friend interrogate you. If your friend is playing devil’s advocate, they will always take the opposing viewpoint and force you to keep defending yourself. If your friend is acting like a child, they will question every sentence, even seemingly self-explanatory ones. If your friend is a doubter, they won’t believe anything you say. Justifying your position verbally or explaining yourself will force you to strengthen the evidence in your paper. If you already have enough evidence but haven’t connected it clearly enough to your main argument, explaining to your friend how the evidence is relevant or what it proves may help you to do so.

Common questions and additional resources

• I have a general topic in mind; how can I develop it so I’ll know what evidence I need? And how can I get ideas for more evidence? See our handout on brainstorming .
• Who can help me find evidence on my topic? Check out UNC Libraries .
• I’m writing for a specific purpose; how can I tell what kind of evidence my audience wants? See our handouts on audience , writing for specific disciplines , and particular writing assignments .
• How should I read materials to gather evidence? See our handout on reading to write .
• How can I make a good argument? Check out our handouts on argument and thesis statements .
• How do I tell if my paragraphs and my paper are well-organized? Review our handouts on paragraph development , transitions , and reorganizing drafts .
• How do I quote my sources and incorporate those quotes into my text? Our handouts on quotations and avoiding plagiarism offer useful tips.
• How do I cite my evidence? See the UNC Libraries citation tutorial .
• I think that I’m giving evidence, but my instructor says I’m using too much summary. How can I tell? Check out our handout on using summary wisely.
• I want to use personal experience as evidence, but can I say “I”? We have a handout on when to use “I.”

Works consulted

We consulted these works while writing this handout. This is not a comprehensive list of resources on the handout’s topic, and we encourage you to do your own research to find additional publications. Please do not use this list as a model for the format of your own reference list, as it may not match the citation style you are using. For guidance on formatting citations, please see the UNC Libraries citation tutorial . We revise these tips periodically and welcome feedback.

Lunsford, Andrea A., and John J. Ruszkiewicz. 2016. Everything’s an Argument , 7th ed. Boston: Bedford/St Martin’s.

Miller, Richard E., and Kurt Spellmeyer. 2016. The New Humanities Reader , 5th ed. Boston: Cengage.

University of Maryland. 2019. “Research Using Primary Sources.” Research Guides. Last updated October 28, 2019. https://lib.guides.umd.edu/researchusingprimarysources .

You may reproduce it for non-commercial use if you use the entire handout and attribute the source: The Writing Center, University of North Carolina at Chapel Hill

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Academic writing often requires students to use evidence, and learning how to use evidence effectively is an important skill for college writers to master. Often, the evidence college writers are asked to use comes from their textbooks, course readings, or other written work by professional scholars. It is important to learn how to use these writings responsibly and accurately.

General Considerations

There are three methods of incorporating the writing of others into your paper as evidence:

• quotation , which is anything from a word to several sentences taken word-for-word from the original source and enclosed in quotation marks
• paraphrase , which is a rephrasing in your own voice and sentence structure of one portion of the original source and is about the same length as the original sentence or sentences you are paraphrasing
• summary , which is shorter than the original source and gives the text’s central idea in your own words

Some words to use in signal phrases are argues, asserts, contends, emphasizes, explains, observes, suggests, writes.

In what follows, you will learn some strategies for using these methods of incorporating evidence into your paper.

In Practice

When you use a quotation as evidence, you should integrate it into your own writing using a “signal phrase.” Take, for example, this quotation, taken from page 418 of the essay “Prejudice and the Individual” by Gordon Allport: “Much prejudice is caught rather than directly taught.” Here are three ways to integrate Allport’s quotation into a sentence of your own with a signal phrase:

Allport claims that “prejudice is caught rather than directly taught” (418). “Much prejudice is caught rather than directly taught,” claims Allport (418). “Much prejudice,” Allport claims, “is caught rather than directly taught” (418).

You can adapt a quotation to fit your own paragraph and sentence structure by making small changes to words and indicating those changes with square brackets. Say, for example, you liked this quotation from Allport:

“It should be added that overgeneralized prejudgments of this sort are prejudices only if they are not reversible when exposed to new knowledge” (417).

However, you want to apply Allport’s words to a specific example of your own. You could adapt the quotation like this:

The young man in my example was not prejudiced, according to Allport’s definition; his opinion was “reversible when [he was] exposed to new knowledge” (417).

You can also use ellipses to indicate that you have left irrelevant words out of a quotation. Again, say you wanted to use this quotation from Allport:

“The best opinion today says that if we eliminate discrimination, then—as people become acquainted with one another on equal terms—attitudes are likely to change, perhaps more rapidly than through the continued preaching or teaching of tolerance” (417).

But the middle part is less important to your paper than what Allport says at the start and the end. You could modify the quotation like this:

“The best opinion today says that if we eliminate discrimination . . . attitudes are likely to change, perhaps more rapidly than through the continued preaching or teaching of tolerance” (417).

Longer quotations must be formatted in a special way; usually, they are indented from the left margin and/or single-spaced. Depending on what citation style you use, guidelines differ regarding what defines a long quotation and how a long quotation should be formatted. Typically, a quotation of four or five lines is considered long.

Paraphrasing

To paraphrase a source for use as evidence, you should use as little of the original language as possible and put the passage in your own voice and sentence structure. Also, because paraphrasing involves wrapping your words around someone else’s idea, people often forget to give credit to the author. Even though a paraphrase is in your words, it is not your idea. Remember to cite your source when you paraphrase. Here is another quotation from Allport and an example of weak and strong paraphrase:

“Education combats easy overgeneralizations, and as the educational level rises we find a reduction in stereotyped thinking” (Allport 422).

WEAK PARAPHRASE: Learning fights against stereotypes, and as more people are more educated we notice a decrease in prejudice (422).

STRONG PARAPHRASE: Allport explains that the more we learn, the harder we will find it to make unfair assumptions about groups of people, which means as more people pursue more education, prejudice decreases (422).

In the weak example above, you can see the sentence structure in the paraphrase is very similar to the quotation—notice, for instance, the use in both the original sentence and the weak paraphrase of a comma plus the conjunction “and.” Also, the replacement of Allport’s words with synonyms makes the paraphrase too close to the original—Allport’s “education” is replaced with “learning” in the paraphrase; his “combats” is exchanged for “fights”; “overgeneralizations” becomes “stereotypes.” The strong example above does a better job of restating Allport’s idea in a new sentence structure and without simple word substitution. Also, notice the weak paraphrase does not give Allport credit by mentioning him, but the strong one does.

Summarizing

When you summarize another writer’s idea to use as evidence in a paper of your own, you are taking the essence of the writer’s idea and stating it more briefly, with less detail and explanation, than in the original. You may summarize an article or a chapter, or even a book, in a sentence, a paragraph, a page, or more—the purpose of your summary should dictate how specific you are. Summaries should be mostly in your own words, but often summaries include quotations or paraphrases when it is necessary to highlight a certain key point. When you are writing a summary, you need to be very careful not to use the original writer’s words without putting those words in quotation marks. You also need to be sure that when you summarize, you are fairly representing the original writer’s main idea. Here is a paragraph from Allport and examples of weak and strong summary:

“While discrimination ultimately rests on prejudice, the two processes are not identical. Discrimination denies people their natural or legal rights because of their membership in some unfavored group. Many people discriminate automatically without being prejudiced; and others, the “gentle people of prejudice,” feel irrational aversion, but are careful not to show it in discriminatory behavior. Yet in general, discrimination reinforces prejudices, and prejudices provide rationalizations for discrimination. The two concepts are most distinct when it comes to seeking remedies. The corrections for discrimination are legal, or lie in a direct change of social practices; whereas the remedy for prejudice lies in education and the conversion of attitudes. The best opinion today says that if we eliminate discrimination, then—as people become acquainted with one another on equal terms—attitudes are likely to change, perhaps more rapidly than through the continued preaching or teaching of tolerance.” (Allport 417)

WEAK SUMMARY: Discrimination is when people are denied their rights because they belong to some unfavored group, and it is addressed with legal action or a change in social practices. Eliminating discrimination from society would have a drastic effect on social attitudes overall, according to Allport (417).

STRONG SUMMARY: Allport explains that discrimination occurs when an individual is refused rights because he or she belongs to a group which is the object of prejudice. In this way, discrimination reinforces prejudice, but if instances of discrimination are ruled illegal or seen as socially unacceptable, prejudice will likely decrease along with discrimination (417).

You will notice that the weak summary above uses exact words and phrases from the source (“unfavored group,” “social practices”) and also some words and phrases very close to the original (“when people are denied,” “eliminating discrimination”). It does not effectively restate the original in different language. It also does not fairly represent the complete idea of the source paragraph: it does not explain the relationship between discrimination and prejudice, an important part of what Allport says. The strong example does a better job using independent language and fairly conveying Allport’s point.

How to choose which method of incorporating evidence to use

These methods of incorporating evidence into your paper are helpful in different ways. Think carefully about what you need each piece of evidence to do for you in your paper, then choose the method that most suits your needs.

You should use a quotation if

• you are relying on the reputation of the writer of the original source to give authority or credibility to your paper.
• the original wording is so remarkable that paraphrasing would diminish it.

A paraphrase is a good choice if

• you need to provide a supporting fact or detail but the original writer’s exact words are not important.
• you need to use just one specific idea from a source and the rest of the source is not as important.

Summary is useful when

• you need to give an overview of a source to orient your reader.
• you want to provide background that leads up to the point of your paper.

Last but certainly not least, remember that anytime you use another person’s ideas or language, you must give credit to that person. If you do not know the name of the person whose idea or language you are using, you must still give credit by referring to a title or any such available information. You should always check with your instructor to see what method of citing and documenting sources you should use. The examples on this handout are cited using MLA style.

The sample text in these exercises is Holly Devor’s “Gender Role Behaviors and Attitudes.”

1. Read the paragraph from Devor below, then identify which summary of it is weak and which is strong.

“Body postures and demeanors which communicate subordinate status and vulnerability to trespass through a message of "no threat" make people appear to be feminine. They demonstrate subordination through a minimizing of spatial use: people appear to be feminine when they keep their arms closer to their bodies, their legs closer together, and their torsos and heads less vertical than do masculine-looking individuals. People also look feminine when they point their toes inward and use their hands in small or childlike gestures.” (486)

A. Devor argues that body language suggests a great deal about gender and power in our society. People who minimize the body space they occupy and whose physical gestures are minimal and unobtrusive appear inferior and feminine (486).

B. Devor says that body postures and demeanors that imply weakness make people look feminine. Minimizing the space one takes up and using infantile gestures also makes one appear feminine (486).

2. Read the sentence from Devor below, then identify which paraphrase of it is weak and which is strong.

“They demonstrate subordination through a minimizing of spatial use: people appear to be feminine when they keep their arms closer to their bodies, their legs closer together, and their torsos and heads less vertical than do masculine-looking individuals.” (486)

A. Devor explains that people demonstrate a lesser position by using less space, keeping arms close, legs together, and head less upright (486).

B. According to Devor, taking up less space with one’s body—keeping arms and legs close and hunching to reduce height—makes one appear inferior and implies femininity (486).

3. The quotations of Devor below, taken from the paragraph in exercise 1, contain technical errors. Identify and correct them.

A. Devor argues that “[b]ody postures and demeanors which communicate subordinate status and vulnerability make people appear to be feminine” (486).

B. The actress looked particularly feminine because she “point their toes inward and use their hands in small or childlike gestures” (486).

C. Devor claims that “using their hands in small or childlike gestures” makes people look feminine (486).

Answers: 1. A. STRONG B. WEAK – This example uses too many exact words and phrases from the original.

2. A. WEAK – This example uses too many exact words and phrases from the source, and its sentence structure is also too close to the original. B. STRONG

3. A. Devor argues that “[b]ody postures and demeanors which communicate subordinate status and vulnerability . . . make people appear to be feminine.” B. The actress looked particularly feminine because she “point[s her] toes inward and use[s her] hands in small or childlike gestures.” C. Devor claims that “us[ing] their hands in small or childlike gestures” makes people look feminine.

Allport, Gordon, “Prejudice and the Individual,” in The Borozoi College Reader , 6th ed. Eds. Charles Muscatine and Marlene Griffith (New York: Alfred A Knopf, 1988): 416-22.

Devor, Holly, “Gender Role Behaviors and Attitudes,” in Signs of Life in the USA: Readings on Popular Culture for Writers , 4th ed. Eds. Sonia Maasik and Jack Solomon (New York: Bedford / St Martin's, 2003): 484-89.

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How to Introduce Evidence: 41 Effective Phrases & Examples

Research requires us to scrutinize information and assess its credibility. Accordingly, when we think about various phenomena, we examine empirical data and craft detailed explanations justifying our interpretations. An essential component of constructing our research narratives is thus providing supporting evidence and examples.

The type of proof we provide can either bolster our claims or leave readers confused or skeptical of our analysis. Therefore, it’s crucial that we use appropriate, logical phrases that guide readers clearly from one idea to the next. In this article, we explain how evidence and examples should be introduced according to different contexts in academic writing and catalog effective language you can use to support your arguments, examples included.

When to Introduce Evidence and Examples in a Paper

Evidence and examples create the foundation upon which your claims can stand firm. Without proof, your arguments lack credibility and teeth. However, laundry listing evidence is as bad as failing to provide any materials or information that can substantiate your conclusions. Therefore, when you introduce examples, make sure to judiciously provide evidence when needed and use phrases that will appropriately and clearly explain how the proof supports your argument.

There are different types of claims and different types of evidence in writing. You should introduce and link your arguments to evidence when you

• state information that is not “common knowledge”;
• draw conclusions, make inferences, or suggest implications based on specific data;
• need to clarify a prior statement, and it would be more effectively done with an illustration;
• need to identify representative examples of a category;
• desire to distinguish concepts; and
• emphasize a point by highlighting a specific situation.

Introductory Phrases to Use and Their Contexts

To assist you with effectively supporting your statements, we have organized the introductory phrases below according to their function. This list is not exhaustive but will provide you with ideas of the types of phrases you can use.

Although any research author can make use of these helpful phrases and bolster their academic writing by entering them into their work, before submitting to a journal, it is a good idea to let a professional English editing service take a look to ensure that all terms and phrases make sense in the given research context. Wordvice offers paper editing , thesis editing , and dissertation editing services that help elevate your academic language and make your writing more compelling to journal authors and researchers alike.

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GPT-fabricated scientific papers on Google Scholar: Key features, spread, and implications for preempting evidence manipulation

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Academic journals, archives, and repositories are seeing an increasing number of questionable research papers clearly produced using generative AI. They are often created with widely available, general-purpose AI applications, most likely ChatGPT, and mimic scientific writing. Google Scholar easily locates and lists these questionable papers alongside reputable, quality-controlled research. Our analysis of a selection of questionable GPT-fabricated scientific papers found in Google Scholar shows that many are about applied, often controversial topics susceptible to disinformation: the environment, health, and computing. The resulting enhanced potential for malicious manipulation of society’s evidence base, particularly in politically divisive domains, is a growing concern.

Swedish School of Library and Information Science, University of Borås, Sweden

Department of Arts and Cultural Sciences, Lund University, Sweden

Division of Environmental Communication, Swedish University of Agricultural Sciences, Sweden

Research Questions

• Where are questionable publications produced with generative pre-trained transformers (GPTs) that can be found via Google Scholar published or deposited?
• What are the main characteristics of these publications in relation to predominant subject categories?
• How are these publications spread in the research infrastructure for scholarly communication?
• How is the role of the scholarly communication infrastructure challenged in maintaining public trust in science and evidence through inappropriate use of generative AI?

research note Summary

• A sample of scientific papers with signs of GPT-use found on Google Scholar was retrieved, downloaded, and analyzed using a combination of qualitative coding and descriptive statistics. All papers contained at least one of two common phrases returned by conversational agents that use large language models (LLM) like OpenAI’s ChatGPT. Google Search was then used to determine the extent to which copies of questionable, GPT-fabricated papers were available in various repositories, archives, citation databases, and social media platforms.
• Roughly two-thirds of the retrieved papers were found to have been produced, at least in part, through undisclosed, potentially deceptive use of GPT. The majority (57%) of these questionable papers dealt with policy-relevant subjects (i.e., environment, health, computing), susceptible to influence operations. Most were available in several copies on different domains (e.g., social media, archives, and repositories).
• Two main risks arise from the increasingly common use of GPT to (mass-)produce fake, scientific publications. First, the abundance of fabricated “studies” seeping into all areas of the research infrastructure threatens to overwhelm the scholarly communication system and jeopardize the integrity of the scientific record. A second risk lies in the increased possibility that convincingly scientific-looking content was in fact deceitfully created with AI tools and is also optimized to be retrieved by publicly available academic search engines, particularly Google Scholar. However small, this possibility and awareness of it risks undermining the basis for trust in scientific knowledge and poses serious societal risks.

Implications

The use of ChatGPT to generate text for academic papers has raised concerns about research integrity. Discussion of this phenomenon is ongoing in editorials, commentaries, opinion pieces, and on social media (Bom, 2023; Stokel-Walker, 2024; Thorp, 2023). There are now several lists of papers suspected of GPT misuse, and new papers are constantly being added. 1 See for example Academ-AI, https://www.academ-ai.info/ , and Retraction Watch, https://retractionwatch.com/papers-and-peer-reviews-with-evidence-of-chatgpt-writing/ . While many legitimate uses of GPT for research and academic writing exist (Huang & Tan, 2023; Kitamura, 2023; Lund et al., 2023), its undeclared use—beyond proofreading—has potentially far-reaching implications for both science and society, but especially for their relationship. It, therefore, seems important to extend the discussion to one of the most accessible and well-known intermediaries between science, but also certain types of misinformation, and the public, namely Google Scholar, also in response to the legitimate concerns that the discussion of generative AI and misinformation needs to be more nuanced and empirically substantiated  (Simon et al., 2023).

Google Scholar, https://scholar.google.com , is an easy-to-use academic search engine. It is available for free, and its index is extensive (Gusenbauer & Haddaway, 2020). It is also often touted as a credible source for academic literature and even recommended in library guides, by media and information literacy initiatives, and fact checkers (Tripodi et al., 2023). However, Google Scholar lacks the transparency and adherence to standards that usually characterize citation databases. Instead, Google Scholar uses automated crawlers, like Google’s web search engine (Martín-Martín et al., 2021), and the inclusion criteria are based on primarily technical standards, allowing any individual author—with or without scientific affiliation—to upload papers to be indexed (Google Scholar Help, n.d.). It has been shown that Google Scholar is susceptible to manipulation through citation exploits (Antkare, 2020) and by providing access to fake scientific papers (Dadkhah et al., 2017). A large part of Google Scholar’s index consists of publications from established scientific journals or other forms of quality-controlled, scholarly literature. However, the index also contains a large amount of gray literature, including student papers, working papers, reports, preprint servers, and academic networking sites, as well as material from so-called “questionable” academic journals, including paper mills. The search interface does not offer the possibility to filter the results meaningfully by material type, publication status, or form of quality control, such as limiting the search to peer-reviewed material.

To understand the occurrence of ChatGPT (co-)authored work in Google Scholar’s index, we scraped it for publications, including one of two common ChatGPT responses (see Appendix A) that we encountered on social media and in media reports (DeGeurin, 2024). The results of our descriptive statistical analyses showed that around 62% did not declare the use of GPTs. Most of these GPT-fabricated papers were found in non-indexed journals and working papers, but some cases included research published in mainstream scientific journals and conference proceedings. 2 Indexed journals mean scholarly journals indexed by abstract and citation databases such as Scopus and Web of Science, where the indexation implies journals with high scientific quality. Non-indexed journals are journals that fall outside of this indexation. More than half (57%) of these GPT-fabricated papers concerned policy-relevant subject areas susceptible to influence operations. To avoid increasing the visibility of these publications, we abstained from referencing them in this research note. However, we have made the data available in the Harvard Dataverse repository.

The publications were related to three issue areas—health (14.5%), environment (19.5%) and computing (23%)—with key terms such “healthcare,” “COVID-19,” or “infection”for health-related papers, and “analysis,” “sustainable,” and “global” for environment-related papers. In several cases, the papers had titles that strung together general keywords and buzzwords, thus alluding to very broad and current research. These terms included “biology,” “telehealth,” “climate policy,” “diversity,” and “disrupting,” to name just a few.  While the study’s scope and design did not include a detailed analysis of which parts of the articles included fabricated text, our dataset did contain the surrounding sentences for each occurrence of the suspicious phrases that formed the basis for our search and subsequent selection. Based on that, we can say that the phrases occurred in most sections typically found in scientific publications, including the literature review, methods, conceptual and theoretical frameworks, background, motivation or societal relevance, and even discussion. This was confirmed during the joint coding, where we read and discussed all articles. It became clear that not just the text related to the telltale phrases was created by GPT, but that almost all articles in our sample of questionable articles likely contained traces of GPT-fabricated text everywhere.

Evidence hacking and backfiring effects

Generative pre-trained transformers (GPTs) can be used to produce texts that mimic scientific writing. These texts, when made available online—as we demonstrate—leak into the databases of academic search engines and other parts of the research infrastructure for scholarly communication. This development exacerbates problems that were already present with less sophisticated text generators (Antkare, 2020; Cabanac & Labbé, 2021). Yet, the public release of ChatGPT in 2022, together with the way Google Scholar works, has increased the likelihood of lay people (e.g., media, politicians, patients, students) coming across questionable (or even entirely GPT-fabricated) papers and other problematic research findings. Previous research has emphasized that the ability to determine the value and status of scientific publications for lay people is at stake when misleading articles are passed off as reputable (Haider & Åström, 2017) and that systematic literature reviews risk being compromised (Dadkhah et al., 2017). It has also been highlighted that Google Scholar, in particular, can be and has been exploited for manipulating the evidence base for politically charged issues and to fuel conspiracy narratives (Tripodi et al., 2023). Both concerns are likely to be magnified in the future, increasing the risk of what we suggest calling evidence hacking —the strategic and coordinated malicious manipulation of society’s evidence base.

The authority of quality-controlled research as evidence to support legislation, policy, politics, and other forms of decision-making is undermined by the presence of undeclared GPT-fabricated content in publications professing to be scientific. Due to the large number of archives, repositories, mirror sites, and shadow libraries to which they spread, there is a clear risk that GPT-fabricated, questionable papers will reach audiences even after a possible retraction. There are considerable technical difficulties involved in identifying and tracing computer-fabricated papers (Cabanac & Labbé, 2021; Dadkhah et al., 2023; Jones, 2024), not to mention preventing and curbing their spread and uptake.

However, as the rise of the so-called anti-vaxx movement during the COVID-19 pandemic and the ongoing obstruction and denial of climate change show, retracting erroneous publications often fuels conspiracies and increases the following of these movements rather than stopping them. To illustrate this mechanism, climate deniers frequently question established scientific consensus by pointing to other, supposedly scientific, studies that support their claims. Usually, these are poorly executed, not peer-reviewed, based on obsolete data, or even fraudulent (Dunlap & Brulle, 2020). A similar strategy is successful in the alternative epistemic world of the global anti-vaccination movement (Carrion, 2018) and the persistence of flawed and questionable publications in the scientific record already poses significant problems for health research, policy, and lawmakers, and thus for society as a whole (Littell et al., 2024). Considering that a person’s support for “doing your own research” is associated with increased mistrust in scientific institutions (Chinn & Hasell, 2023), it will be of utmost importance to anticipate and consider such backfiring effects already when designing a technical solution, when suggesting industry or legal regulation, and in the planning of educational measures.

Recommendations

Solutions should be based on simultaneous considerations of technical, educational, and regulatory approaches, as well as incentives, including social ones, across the entire research infrastructure. Paying attention to how these approaches and incentives relate to each other can help identify points and mechanisms for disruption. Recognizing fraudulent academic papers must happen alongside understanding how they reach their audiences and what reasons there might be for some of these papers successfully “sticking around.” A possible way to mitigate some of the risks associated with GPT-fabricated scholarly texts finding their way into academic search engine results would be to provide filtering options for facets such as indexed journals, gray literature, peer-review, and similar on the interface of publicly available academic search engines. Furthermore, evaluation tools for indexed journals 3 Such as LiU Journal CheckUp, https://ep.liu.se/JournalCheckup/default.aspx?lang=eng . could be integrated into the graphical user interfaces and the crawlers of these academic search engines. To enable accountability, it is important that the index (database) of such a search engine is populated according to criteria that are transparent, open to scrutiny, and appropriate to the workings of  science and other forms of academic research. Moreover, considering that Google Scholar has no real competitor, there is a strong case for establishing a freely accessible, non-specialized academic search engine that is not run for commercial reasons but for reasons of public interest. Such measures, together with educational initiatives aimed particularly at policymakers, science communicators, journalists, and other media workers, will be crucial to reducing the possibilities for and effects of malicious manipulation or evidence hacking. It is important not to present this as a technical problem that exists only because of AI text generators but to relate it to the wider concerns in which it is embedded. These range from a largely dysfunctional scholarly publishing system (Haider & Åström, 2017) and academia’s “publish or perish” paradigm to Google’s near-monopoly and ideological battles over the control of information and ultimately knowledge. Any intervention is likely to have systemic effects; these effects need to be considered and assessed in advance and, ideally, followed up on.

Our study focused on a selection of papers that were easily recognizable as fraudulent. We used this relatively small sample as a magnifying glass to examine, delineate, and understand a problem that goes beyond the scope of the sample itself, which however points towards larger concerns that require further investigation. The work of ongoing whistleblowing initiatives 4 Such as Academ-AI, https://www.academ-ai.info/ , and Retraction Watch, https://retractionwatch.com/papers-and-peer-reviews-with-evidence-of-chatgpt-writing/ . , recent media reports of journal closures (Subbaraman, 2024), or GPT-related changes in word use and writing style (Cabanac et al., 2021; Stokel-Walker, 2024) suggest that we only see the tip of the iceberg. There are already more sophisticated cases (Dadkhah et al., 2023) as well as cases involving fabricated images (Gu et al., 2022). Our analysis shows that questionable and potentially manipulative GPT-fabricated papers permeate the research infrastructure and are likely to become a widespread phenomenon. Our findings underline that the risk of fake scientific papers being used to maliciously manipulate evidence (see Dadkhah et al., 2017) must be taken seriously. Manipulation may involve undeclared automatic summaries of texts, inclusion in literature reviews, explicit scientific claims, or the concealment of errors in studies so that they are difficult to detect in peer review. However, the mere possibility of these things happening is a significant risk in its own right that can be strategically exploited and will have ramifications for trust in and perception of science. Society’s methods of evaluating sources and the foundations of media and information literacy are under threat and public trust in science is at risk of further erosion, with far-reaching consequences for society in dealing with information disorders. To address this multifaceted problem, we first need to understand why it exists and proliferates.

Finding 1: 139 GPT-fabricated, questionable papers were found and listed as regular results on the Google Scholar results page. Non-indexed journals dominate.

Most questionable papers we found were in non-indexed journals or were working papers, but we did also find some in established journals, publications, conferences, and repositories. We found a total of 139 papers with a suspected deceptive use of ChatGPT or similar LLM applications (see Table 1). Out of these, 19 were in indexed journals, 89 were in non-indexed journals, 19 were student papers found in university databases, and 12 were working papers (mostly in preprint databases). Table 1 divides these papers into categories. Health and environment papers made up around 34% (47) of the sample. Of these, 66% were present in non-indexed journals.

Finding 2: GPT-fabricated, questionable papers are disseminated online, permeating the research infrastructure for scholarly communication, often in multiple copies. Applied topics with practical implications dominate.

The 20 papers concerning health-related issues are distributed across 20 unique domains, accounting for 46 URLs. The 27 papers dealing with environmental issues can be found across 26 unique domains, accounting for 56 URLs.  Most of the identified papers exist in multiple copies and have already spread to several archives, repositories, and social media. It would be difficult, or impossible, to remove them from the scientific record.

As apparent from Table 2, GPT-fabricated, questionable papers are seeping into most parts of the online research infrastructure for scholarly communication. Platforms on which identified papers have appeared include ResearchGate, ORCiD, Journal of Population Therapeutics and Clinical Pharmacology (JPTCP), Easychair, Frontiers, the Institute of Electrical and Electronics Engineer (IEEE), and X/Twitter. Thus, even if they are retracted from their original source, it will prove very difficult to track, remove, or even just mark them up on other platforms. Moreover, unless regulated, Google Scholar will enable their continued and most likely unlabeled discoverability.

A word rain visualization (Centre for Digital Humanities Uppsala, 2023), which combines word prominences through TF-IDF 5 Term frequency–inverse document frequency , a method for measuring the significance of a word in a document compared to its frequency across all documents in a collection. scores with semantic similarity of the full texts of our sample of GPT-generated articles that fall into the “Environment” and “Health” categories, reflects the two categories in question. However, as can be seen in Figure 1, it also reveals overlap and sub-areas. The y-axis shows word prominences through word positions and font sizes, while the x-axis indicates semantic similarity. In addition to a certain amount of overlap, this reveals sub-areas, which are best described as two distinct events within the word rain. The event on the left bundles terms related to the development and management of health and healthcare with “challenges,” “impact,” and “potential of artificial intelligence”emerging as semantically related terms. Terms related to research infrastructures, environmental, epistemic, and technological concepts are arranged further down in the same event (e.g., “system,” “climate,” “understanding,” “knowledge,” “learning,” “education,” “sustainable”). A second distinct event further to the right bundles terms associated with fish farming and aquatic medicinal plants, highlighting the presence of an aquaculture cluster.  Here, the prominence of groups of terms such as “used,” “model,” “-based,” and “traditional” suggests the presence of applied research on these topics. The two events making up the word rain visualization, are linked by a less dominant but overlapping cluster of terms related to “energy” and “water.”

The bar chart of the terms in the paper subset (see Figure 2) complements the word rain visualization by depicting the most prominent terms in the full texts along the y-axis. Here, word prominences across health and environment papers are arranged descendingly, where values outside parentheses are TF-IDF values (relative frequencies) and values inside parentheses are raw term frequencies (absolute frequencies).

Finding 3: Google Scholar presents results from quality-controlled and non-controlled citation databases on the same interface, providing unfiltered access to GPT-fabricated questionable papers.

Google Scholar’s central position in the publicly accessible scholarly communication infrastructure, as well as its lack of standards, transparency, and accountability in terms of inclusion criteria, has potentially serious implications for public trust in science. This is likely to exacerbate the already-known potential to exploit Google Scholar for evidence hacking (Tripodi et al., 2023) and will have implications for any attempts to retract or remove fraudulent papers from their original publication venues. Any solution must consider the entirety of the research infrastructure for scholarly communication and the interplay of different actors, interests, and incentives.

We searched and scraped Google Scholar using the Python library Scholarly (Cholewiak et al., 2023) for papers that included specific phrases known to be common responses from ChatGPT and similar applications with the same underlying model (GPT3.5 or GPT4): “as of my last knowledge update” and/or “I don’t have access to real-time data” (see Appendix A). This facilitated the identification of papers that likely used generative AI to produce text, resulting in 227 retrieved papers. The papers’ bibliographic information was automatically added to a spreadsheet and downloaded into Zotero. 6 An open-source reference manager, https://zotero.org .

We employed multiple coding (Barbour, 2001) to classify the papers based on their content. First, we jointly assessed whether the paper was suspected of fraudulent use of ChatGPT (or similar) based on how the text was integrated into the papers and whether the paper was presented as original research output or the AI tool’s role was acknowledged. Second, in analyzing the content of the papers, we continued the multiple coding by classifying the fraudulent papers into four categories identified during an initial round of analysis—health, environment, computing, and others—and then determining which subjects were most affected by this issue (see Table 1). Out of the 227 retrieved papers, 88 papers were written with legitimate and/or declared use of GPTs (i.e., false positives, which were excluded from further analysis), and 139 papers were written with undeclared and/or fraudulent use (i.e., true positives, which were included in further analysis). The multiple coding was conducted jointly by all authors of the present article, who collaboratively coded and cross-checked each other’s interpretation of the data simultaneously in a shared spreadsheet file. This was done to single out coding discrepancies and settle coding disagreements, which in turn ensured methodological thoroughness and analytical consensus (see Barbour, 2001). Redoing the category coding later based on our established coding schedule, we achieved an intercoder reliability (Cohen’s kappa) of 0.806 after eradicating obvious differences.

The ranking algorithm of Google Scholar prioritizes highly cited and older publications (Martín-Martín et al., 2016). Therefore, the position of the articles on the search engine results pages was not particularly informative, considering the relatively small number of results in combination with the recency of the publications. Only the query “as of my last knowledge update” had more than two search engine result pages. On those, questionable articles with undeclared use of GPTs were evenly distributed across all result pages (min: 4, max: 9, mode: 8), with the proportion of undeclared use being slightly higher on average on later search result pages.

To understand how the papers making fraudulent use of generative AI were disseminated online, we programmatically searched for the paper titles (with exact string matching) in Google Search from our local IP address (see Appendix B) using the googlesearch – python library(Vikramaditya, 2020). We manually verified each search result to filter out false positives—results that were not related to the paper—and then compiled the most prominent URLs by field. This enabled the identification of other platforms through which the papers had been spread. We did not, however, investigate whether copies had spread into SciHub or other shadow libraries, or if they were referenced in Wikipedia.

We used descriptive statistics to count the prevalence of the number of GPT-fabricated papers across topics and venues and top domains by subject. The pandas software library for the Python programming language (The pandas development team, 2024) was used for this part of the analysis. Based on the multiple coding, paper occurrences were counted in relation to their categories, divided into indexed journals, non-indexed journals, student papers, and working papers. The schemes, subdomains, and subdirectories of the URL strings were filtered out while top-level domains and second-level domains were kept, which led to normalizing domain names. This, in turn, allowed the counting of domain frequencies in the environment and health categories. To distinguish word prominences and meanings in the environment and health-related GPT-fabricated questionable papers, a semantically-aware word cloud visualization was produced through the use of a word rain (Centre for Digital Humanities Uppsala, 2023) for full-text versions of the papers. Font size and y-axis positions indicate word prominences through TF-IDF scores for the environment and health papers (also visualized in a separate bar chart with raw term frequencies in parentheses), and words are positioned along the x-axis to reflect semantic similarity (Skeppstedt et al., 2024), with an English Word2vec skip gram model space (Fares et al., 2017). An English stop word list was used, along with a manually produced list including terms such as “https,” “volume,” or “years.”

• Artificial Intelligence
• / Search engines

Cite this Essay

Haider, J., Söderström, K. R., Ekström, B., & Rödl, M. (2024). GPT-fabricated scientific papers on Google Scholar: Key features, spread, and implications for preempting evidence manipulation. Harvard Kennedy School (HKS) Misinformation Review . https://doi.org/10.37016/mr-2020-156

• / Appendix B

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This research has been supported by Mistra, the Swedish Foundation for Strategic Environmental Research, through the research program Mistra Environmental Communication (Haider, Ekström, Rödl) and the Marcus and Amalia Wallenberg Foundation [2020.0004] (Söderström).

Competing Interests

The authors declare no competing interests.

The research described in this article was carried out under Swedish legislation. According to the relevant EU and Swedish legislation (2003:460) on the ethical review of research involving humans (“Ethical Review Act”), the research reported on here is not subject to authorization by the Swedish Ethical Review Authority (“etikprövningsmyndigheten”) (SRC, 2017).

This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author and source are properly credited.

Data Availability

All data needed to replicate this study are available at the Harvard Dataverse: https://doi.org/10.7910/DVN/WUVD8X

Acknowledgements

The authors wish to thank two anonymous reviewers for their valuable comments on the article manuscript as well as the editorial group of Harvard Kennedy School (HKS) Misinformation Review for their thoughtful feedback and input.

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• How to Cite a Book | APA, MLA, & Chicago Examples

How to Cite a Book | APA, MLA, & Chicago Examples

Published on February 26, 2021 by Jack Caulfield . Revised on January 17, 2024.

To cite a book, you need a brief in-text citation and a corresponding reference listing the author’s name, the title, the year of publication, and the publisher. The order and format of information depends on the citation style you’re using. The most common styles are APA , MLA , and Chicago style .

Use the interactive example generator to explore the format of book citations in MLA and APA.

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Table of contents

Citing a book in mla style, citing a book in apa style, citing a book in chicago style, where to find source information in a book, frequently asked questions about citations.

An MLA book citation includes the author’s name , the book title (in italics, capitalized headline-style), the edition (if specified), the publisher, and the year of publication. If it’s an e-book , write “e-book” (or a more specific description, e.g. “Kindle ed.”) before the publisher name.

The corresponding in-text citation lists the author’s last name and the page number of the passage cited.

You can also use our free MLA Citation Generator to create your book citations.

Generate accurate MLA citations with Scribbr

Citing a book chapter in mla.

To cite a book chapter , first give the author and title (in quotation marks) of the chapter cited, then information about the book as a whole and the page range of the specific chapter.

The in-text citation lists the author of the chapter and the page number of the relevant passage.

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An APA Style book citation lists the author’s last name and initials, the year of publication, the title and any subtitle (in italics, capitalizing only the first word), the edition (if specified), and the publisher. Add a DOI or URL to the end of the entry if available (e.g. for e-books or books accessed online ).

In an in-text citation, state the author’s last name and the publication year, and a page number if you need to show the location of a specific quote or paraphrase .

You can also use our free APA Citation Generator to automatically generate your book citations. Search for a title, DOI, or ISBN to retrieve the details.

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Citing a book chapter in apa.

To cite a book chapter , list information about the chapter first, followed by information about the book, including the book’s editor(s) and the chapter’s page range within the book.

The author of the chapter, not the editor of the book, is listed in the in-text citation.

Chicago notes and bibliography style uses footnotes to cite sources instead of parenthetical citations. These notes refer to a bibliography at the end giving full source details.

A Chicago bibliography entry for a book includes the author’s name, the book title and subtitle, the edition (if stated), the location and name of the publisher, and the year of publication. For an e-book , add the e-book format (e.g. “Kindle”) at the end.

Chicago also has an alternative style, Chicago author-date . You can see examples of book citations in this style here .

Citing a book chapter in Chicago

To cite a book chapter , start with the author and the title of the chapter (in quotation marks), then give the title (in italics) and editor of the book, the page range of the chapter, the location and name of the publisher, and the year of publication.

All the information you need for a book citation can usually be found on the book’s title page and copyright page. The main things you’re looking for are:

• the title (and subtitle if present)
• name(s) of the author(s)
• year of publication
• place of publication

You should also check if the book specifies an edition (e.g. 2nd edition, revised edition) and if any other contributors are named (e.g. editor, translator).

The image below shows where to find the relevant information on the title and copyright pages of a typical book.

The main elements included in all book citations across APA , MLA , and Chicago style are the author, the title, the year of publication, and the name of the publisher. A page number is also included in in-text citations to highlight the specific passage cited.

In Chicago style and in the 6th edition of APA Style , the location of the publisher is also included, e.g. London: Penguin.

When a book’s chapters are written by different authors, you should cite the specific chapter you are referring to.

When all the chapters are written by the same author (or group of authors), you should usually cite the entire book, but some styles include exceptions to this.

• In APA Style , single-author books should always be cited as a whole, even if you only quote or paraphrase from one chapter.
• In MLA Style , if a single-author book is a collection of stand-alone works (e.g. short stories ), you should cite the individual work.
• In Chicago Style , you may choose to cite a single chapter of a single-author book if you feel it is more appropriate than citing the whole book.

Check if your university or course guidelines specify which citation style to use. If the choice is left up to you, consider which style is most commonly used in your field.

• APA Style is the most popular citation style, widely used in the social and behavioral sciences.
• MLA style is the second most popular, used mainly in the humanities.
• Chicago notes and bibliography style is also popular in the humanities, especially history.
• Chicago author-date style tends to be used in the sciences.

Other more specialized styles exist for certain fields, such as Bluebook and OSCOLA for law.

The most important thing is to choose one style and use it consistently throughout your text.

The abbreviation “ et al. ” (Latin for “and others”) is used to shorten citations of sources with multiple authors.

“Et al.” is used in APA in-text citations of sources with 3+ authors, e.g. (Smith et al., 2019). It is not used in APA reference entries .

Use “et al.” for 3+ authors in MLA in-text citations and Works Cited entries.

Use “et al.” for 4+ authors in a Chicago in-text citation , and for 10+ authors in a Chicago bibliography entry.

When you want to cite a specific passage in a source without page numbers (e.g. an e-book or website ), all the main citation styles recommend using an alternate locator in your in-text citation . You might use a heading or chapter number, e.g. (Smith, 2016, ch. 1)

In APA Style , you can count the paragraph numbers in a text to identify a location by paragraph number. MLA and Chicago recommend that you only use paragraph numbers if they’re explicitly marked in the text.

For audiovisual sources (e.g. videos ), all styles recommend using a timestamp to show a specific point in the video when relevant.

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Caulfield, J. (2024, January 17). How to Cite a Book | APA, MLA, & Chicago Examples. Scribbr. Retrieved September 4, 2024, from https://www.scribbr.com/citing-sources/cite-a-book/

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